In Fukudome, Kitadani Village, Tottori Prefecture, the radon content of well waters and waters in rice-field and earth temperatures were determined. The radon content of waters in "A" district was higher than that in its neighbourhood, and earth temperatures of "A'" district were higher than those in its neighbourhood. Furthermore, "A" district coincides nearly with "A'" district. These results seem to be dne to the effects of the spring which issues in A (or N) district and supplies a water of high salinity.

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